Thermal Shock Performance of Al2O3/TiO2 Air Plasma Spray Coatings

2011 ◽  
Vol 328-330 ◽  
pp. 853-856 ◽  
Author(s):  
Sun Hui Yao ◽  
Yan Liang Su ◽  
Wen Xian Kao
Keyword(s):  
Thermal Shock ◽  
Plasma Spray ◽  
Hardness Test ◽  
Thermal Shock Test ◽  
Air Plasma Spray ◽  
Air Plasma ◽  
Spray Coatings ◽  
Plasma Spray Coatings ◽  
Quenching Method ◽  
Coating Hardness

This study aimed to understand the effect of TiO2 content on the thermal shock performance of Al2O3/TiO2 air plasma spray coatings. Three kinds of commercial feedstock powders were used, i.e. Al2O3, Al2O3-13wt%TiO2 and Al2O3-40wt%TiO2. The resulting coatings were studied in terms of micro Vickers hardness test, XRD, SEM and thermal shock test. The last was conducted using a water quenching method. The results showed that both the coating hardness and thermal shock performance decreased with the TiO2 content.

Front surface thermal property measurements of air plasma spray coatings

2009 ◽  
Vol 105 (8) ◽  
pp. 083501 ◽  
Author(s):  
Ted Bennett ◽  
Tyler Kakuda ◽  
Anand Kulkarni
Keyword(s):  
Thermal Property ◽  
Plasma Spray ◽  
Front Surface ◽  
Air Plasma Spray ◽  
Air Plasma ◽  
Spray Coatings ◽  
Plasma Spray Coatings

Investigation and Analysis of Wear Reduction in Piston Rings through Coating

2015 ◽  
Vol 813-814 ◽  
pp. 874-879
Author(s):  
P. Jayanth ◽  
E. Sangeeth Kumar
Keyword(s):  
Plasma Spray ◽  
Piston Ring ◽  
Engine Performance ◽  
Spray Coating ◽  
Hardness Test ◽  
Barrier Properties ◽  
Piston Rings ◽  
Spray Coatings ◽  
Plasma Spray Coatings ◽  
Wear Reduction

In this study, the surface of a Piston Ring in the engine is coated with multilayered coating powder using plasma-spray technique, and its surface behavior is subsequently analyzed. The purpose of this study is to analyze the mechanical and thermal effects of surface coating for a Piston Ring during friction. Here specimens with and without coatings were prepared and then microstructure, hardness and corrosion tests were carried out. From the experimental results and Ansys results, it has been found that the coated specimen has improved the properties in improving the diesel engine performance. The results show less deformation and fewer scratches due to wear on the multilayer coated Piston Ring as compared to the uncoated one. The surfaces topography and the structure of the plasma spray coatings is observed on the scanning Electron microscope. The evaluation of the adhesion of coatings is made using the hardness test and also compared using the thermal barrier properties. Taking into account the results of measurements, one can state that the lowest wear and thermal resistance on piston rings by plasma spray coating.

Microstructure and Properties of Plasma Spray Coatings Prepared from Ti-Zr-Ni Quasicrystalline Powders

2007 ◽  
Vol 534-536 ◽  
pp. 89-92 ◽  
Author(s):  
Hyun Kwang Seok ◽  
Yu Chan Kim ◽  
Frédéric Prima ◽  
Eric Fleury
Keyword(s):  
Plasma Spray ◽  
Volume Fraction ◽  
Icosahedral Phase ◽  
Vacuum Plasma Spray ◽  
Laves Phases ◽  
Electrochemical Tests ◽  
Spray Coatings ◽  
Plasma Spray Coatings ◽  
Zro2 Phase ◽  
Coating Layers

This works deals with the deposition of Ti-Zr-Ni icosahedral quasicrystalline powders by low vacuum plasma spray technique and the performances of the resulting coating layers. The microstructure of the coatings, as analyzed by X-ray diffraction and TEM techniques, consisted of nanometer-sized W-Ti50Zr35Ni15 1/1 cubic approximant and TiZrNi Laves phases as well as a low volume fraction of submicrometer-sized ZrO2 phase. The absence of the icosahedral phase in the coating layers was explained by the loss of Ti during plasma spraying. The shift in the composition and the presence of the ZrO2 phase within the coating layers are believed to be responsible for the reduced microhardness and corrosion performances evaluated by electrochemical tests in a Hanks’ Balance Salt Solution at 37oC.

Pressure-Based Liquid Feed System for Suspension Plasma Spray Coatings

2011 ◽  
Vol 20 (4) ◽  
pp. 967-973 ◽  
Author(s):  
Elliot M. Cotler ◽  
Dianying Chen ◽  
Ronald J. Molz
Keyword(s):  
Plasma Spray ◽  
Suspension Plasma Spray ◽  
Feed System ◽  
Spray Coatings ◽  
Plasma Spray Coatings ◽  
Liquid Feed
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